search for: rc68208

...d "LLVM". >> >> The LLVM converters were invariably the slowest. > > UTF conversion is not on any hot paths, as far as I know, so nobody has > spent any time optimizing it.  If you're interested in the history of > the LLVM code, see https://reviews.llvm.org/rC68208 ; it's mostly > untouched since then, except for a few bugfixes. Given https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823100 https://bugs.llvm.org/show_bug.cgi?id=32962 I think moving away from it should be encouraged, assuming use of that file can be removed. Thanks, Stephen.

At CPPcon last week, I saw a talk by Bob Steagall called "Fast Conversion From UTF-8 with C++, DFAs, and SSE Intrinsics." Part of this talk included data from a half-dozen or so conversion libraries... one of which was labeled "LLVM". The LLVM converters were invariably the slowest. On Windows, the mbtowc (or something like that) syscall was pretty good. Steagall's